Currently, Dr. Wang works on the physics, materials and devices for low energy dissipation in electronics
and spintronics. He continues to advance the frontiers in these areas. His recent work on topological
insulators is of a prime example. His continuous work results in various mechanisms to improve the
performance of magnetic memory and devices to reduce dissipation. More recently he works on spin
orbit torque, and other innovative areas of spintronics.
Spin-Orbit Torque: He continues to study the spin orbit coupling and its engineering for energy efficient
physics, mechanisms and devices. To improve the energy efficient switching of magnets, he explores the
use of the spin-momentum lock of Dirac fermions of the surfaces states of topological insulators, e.g.,
BiSbTe for spin orbit torque and switching of magnetic thin films. He has discovered giant spin orbit
torques from the Dirac fermions. In addition to the important practical applications, it points to the new
research directions to further uncover the engineering of SOC.
Magneto-Electric Magnetic Random Access Memory (Me-RAM): His work on voltage controlled
magnetic memory continues to improve the efficiency of voltage control by lifelong interface materials
and structures. As a result, the working voltage is continuously scaled down to further reduce energy
dissipation. His work also extends to antiferromagnetic materials which will have a potential of increasing
performance frequency to THz.
Topological Insulator and Molecular beam epitaxy (MBE): He has worked on MBE growth and
characterizations for several decades. Recently he is one of the leaders in growth of topological insulators,
dilute magnetic semiconductors. This long term research led to many breakthrough in condensed matters
such as discovery of giant spin orbit torque and quantum anomalous Hall, dissipationless transport
without applied magnetic field. His research continues towards understanding new physics and
developing material and devices for room temperature operation. His creative material growth by MBE
led to the consistent reproducible result of quantum Anomalous Hall effect. The consistent reproducible
result led to his recent discovery/verification of hypothetic Majorana Fermions.